Add a tiny system application to read the current temperature

system/Kconfig

@@ -75,6 +75,10 @@ menu "Sysinfo"
 source "$APPSDIR/system/sysinfo/Kconfig"
 endmenu
 
+menu "Temperature"
+source "$APPSDIR/system/lm75/Kconfig"
+endmenu
+
 menu "VI Work-Alike Editor"
 source "$APPSDIR/system/vi/Kconfig"
 endmenu

system/Make.defs

@@ -126,6 +126,10 @@ ifeq ($(CONFIG_SYSTEM_CLE),y)
 CONFIGURED_APPS += system/cle
 endif
 
+ifeq ($(CONFIG_SYSTEM_LM75),y)
+CONFIGURED_APPS += system/lm75
+endif
+
 ifeq ($(CONFIG_SYSTEM_VI),y)
 CONFIGURED_APPS += system/vi
 endif

system/Makefile

@@ -38,8 +38,8 @@
 # Sub-directories containing system tasks/libraries
 
 SUBDIRS  = cdcacm cle composite cu flash_eraseall free i2c hex2bin inifile
-SUBDIRS += install mdio nxplayer poweroff ramtest ramtron readline sdcard
+SUBDIRS += install lm75 mdio nxplayer poweroff ramtest ramtron readline
-SUBDIRS += stackmonitor sudoku sysinfo usbmonitor usbmsc vi zmodem
+SUBDIRS += sdcard stackmonitor sudoku sysinfo usbmonitor usbmsc vi zmodem
 
 # Create the list of installed runtime modules (INSTALLED_DIRS)
 

system/lm75/.gitignore

@@ -0,0 +1,11 @@
+/Make.dep
+/.depend
+/.built
+/*.asm
+/*.rel
+/*.lst
+/*.sym
+/*.adb
+/*.lib
+/*.src
+/*.obj

system/lm75/Kconfig

@@ -0,0 +1,41 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+config SYSTEM_LM75
+	bool "Temperature"
+	default n
+	depends on I2C_LM75
+	---help---
+		Enable support for the NSH temp command.  This command will read the
+		current temperature from an LM-75 (or compatible) temperature sensor
+		and show the temperature on stdout.
+
+if SYSTEM_LM75
+
+config SYSTEM_LM75_DEVNAME
+	string "Temperature sensing device"
+	default "/dev/temp"
+
+choice
+	prompt "Temperature units"
+	default SYSTEM_LM75_FAHRENHEIT
+
+config SYSTEM_LM75_FAHRENHEIT
+	bool "Fahrenheit"
+
+config SYSTEM_LM75_CENTIGRADE
+	bool "Centigrade"
+
+endchoice
+
+config SYSTEM_LM75_STACKSIZE
+	int "Stack size (bytes)"
+	default 1024
+
+config SYSTEM_LM75_PRIORITY
+	int "Command priority"
+	default 100
+
+endif

system/lm75/Makefile

@@ -0,0 +1,149 @@
+############################################################################
+# apps/system/lm75/Makefile
+#
+#   Copyright (C) 2015 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+# TODO, this makefile should run make under the app dirs, instead of
+# sourcing the Make.defs!
+
+-include $(TOPDIR)/.config
+-include $(TOPDIR)/Make.defs
+include $(APPDIR)/Make.defs
+
+ifeq ($(WINTOOL),y)
+INCDIROPT = -w
+endif
+
+# LM-75 Temperature Sensor Application
+
+CONFIG_SYSTEM_LM75_PRIORITY ?= 100
+CONFIG_SYSTEM_LM75_STACKSIZE ?= 1024
+
+APPNAME = temp
+PRIORITY = $(CONFIG_SYSTEM_LM75_PRIORITY)
+STACKSIZE = $(CONFIG_SYSTEM_LM75_STACKSIZE)
+
+ASRCS =
+CSRCS =
+MAINSRC = lm75.c
+
+AOBJS = $(ASRCS:.S=$(OBJEXT))
+COBJS = $(CSRCS:.c=$(OBJEXT))
+MAINOBJ = $(MAINSRC:.c=$(OBJEXT))
+
+SRCS = $(ASRCS) $(CSRCS) $(MAINSRC)
+OBJS = $(AOBJS) $(COBJS)
+
+ifneq ($(CONFIG_BUILD_KERNEL),y)
+  OBJS += $(MAINOBJ)
+endif
+
+ifeq ($(CONFIG_WINDOWS_NATIVE),y)
+  BIN = ..\..\libapps$(LIBEXT)
+else
+ifeq ($(WINTOOL),y)
+  BIN = ..\\..\\libapps$(LIBEXT)
+else
+  BIN = ../../libapps$(LIBEXT)
+endif
+endif
+
+ifeq ($(WINTOOL),y)
+  INSTALL_DIR = "${shell cygpath -w $(BIN_DIR)}"
+else
+  INSTALL_DIR = $(BIN_DIR)
+endif
+
+CONFIG_XYZ_PROGNAME ?= lm75$(EXEEXT)
+PROGNAME = $(CONFIG_XYZ_PROGNAME)
+
+ROOTDEPPATH = --dep-path .
+
+# Common build
+
+VPATH =
+
+all: .built
+.PHONY: context depend clean distclean
+
+$(AOBJS): %$(OBJEXT): %.S
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS) $(MAINOBJ): %$(OBJEXT): %.c
+	$(call COMPILE, $<, $@)
+
+.built: $(OBJS)
+	$(call ARCHIVE, $(BIN), $(OBJS))
+	$(Q) touch .built
+
+ifeq ($(CONFIG_BUILD_KERNEL),y)
+$(BIN_DIR)$(DELIM)$(PROGNAME): $(OBJS) $(MAINOBJ)
+	@echo "LD: $(PROGNAME)"
+	$(Q) $(LD) $(LDELFFLAGS) $(LDLIBPATH) -o $(INSTALL_DIR)$(DELIM)$(PROGNAME) $(ARCHCRT0OBJ) $(MAINOBJ) $(LDLIBS)
+	$(Q) $(NM) -u  $(INSTALL_DIR)$(DELIM)$(PROGNAME)
+
+install: $(BIN_DIR)$(DELIM)$(PROGNAME)
+
+else
+install:
+
+endif
+
+# Register application
+
+ifeq ($(CONFIG_NSH_BUILTIN_APPS),y)
+$(BUILTIN_REGISTRY)$(DELIM)$(APPNAME)_main.bdat: $(DEPCONFIG) Makefile
+	$(call REGISTER,$(APPNAME),$(PRIORITY),$(STACKSIZE),lm75_main)
+
+context: $(BUILTIN_REGISTRY)$(DELIM)$(APPNAME)_main.bdat
+else
+context:
+endif
+
+# Create dependencies
+
+.depend: Makefile $(SRCS)
+	$(Q) $(MKDEP) $(ROOTDEPPATH) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
+	$(Q) touch $@
+
+depend: .depend
+
+clean:
+	$(call DELFILE, .built)
+	$(call CLEAN)
+
+distclean: clean
+	$(call DELFILE, Make.dep)
+	$(call DELFILE, .depend)
+
+-include Make.dep

system/lm75/lm75.c

@@ -0,0 +1,156 @@
+/****************************************************************************
+ * apps/system/lm75/lm75.c
+ *
+ *   Copyright (C) 2015 Gregory Nutt. All rights reserved.
+ *   Authors: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <fixedmath.h>
+
+#include <nuttx/sensors/lm75.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef CONFIG_SYSTEM_LM75_DEVNAME
+#  warning CONFIG_SYSTEM_LM75_DEVNAME is not defined
+#  define CONFIG_SYSTEM_LM75_DEVNAME"/dev/temp"
+#endif
+
+#if !defined(CONFIG_SYSTEM_LM75_FAHRENHEIT) && !defined(CONFIG_SYSTEM_LM75_CENTIGRADE)
+#  warning one of CONFIG_SYSTEM_LM75_FAHRENHEIT or CONFIG_SYSTEM_LM75_CENTIGRADE must be defined
+#  defeind CONFIG_SYSTEM_LM75_FAHRENHEIT 1
+#endif
+
+#if defined(CONFIG_SYSTEM_LM75_FAHRENHEIT) && defined(CONFIG_SYSTEM_LM75_CENTIGRADE)
+#  warning both of CONFIG_SYSTEM_LM75_FAHRENHEIT and CONFIG_SYSTEM_LM75_CENTIGRADE defined
+#  undef CONFIG_SYSTEM_LM75_CENTIGRADE
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+#ifdef CONFIG_BUILD_KERNEL
+int main(int argc, FAR char *argv[])
+#else
+int lm75_main(int argc, char *argv[])
+#endif
+{
+#ifdef CONFIG_LIBC_FLOATINGPOINT
+  double temp;
+#endif
+  b16_t temp16;
+  ssize_t nbytes;
+  int fd;
+  int ret;
+
+  /* Open the temperature sensor device */
+
+  fd  = open(CONFIG_SYSTEM_LM75_DEVNAME, O_RDONLY);
+  if (fd < 0)
+    {
+      fprintf(stderr, "ERROR: Failed to open %s: %d\n",
+              CONFIG_SYSTEM_LM75_DEVNAME, errno);
+      return EXIT_FAILURE;
+    }
+
+#ifdef CONFIG_SYSTEM_LM75_FAHRENHEIT
+  /* Select Fahrenheit scaling */
+
+  ret = ioctl(fd, SNIOC_FAHRENHEIT, 0);
+  if (ret < 0)
+    {
+      fprintf(stderr, "ERROR: ioctl(SNIOC_FAHRENHEIT) failed: %d\n",
+              errno);
+      return EXIT_FAILURE;
+    }
+#else
+  /* Select Fahrenheit scaling */
+
+  ret = ioctl(fd, SNIOC_CENTIGRADE, 0);
+  if (ret < 0)
+    {
+      fprintf(stderr, "ERROR: ioctl(SNIOC_CENTIGRADE) failed: %d\n",
+              errno);
+      return EXIT_FAILURE;
+    }
+#endif
+
+  /* Read the current temperature as a fixed precision number */
+
+  nbytes = read(fd, &temp16, sizeof(b16_t));
+  close(fd);
+
+  if (nbytes < 0)
+    {
+      fprintf(stderr, "ERROR: read(%d) failed: %d\n",
+              sizeof(b16_t), errno);
+      return EXIT_FAILURE;
+    }
+
+  if (nbytes != sizeof(b16_t))
+    {
+      fprintf(stderr, "ERROR: Unexpected read size: %Ld vs %d\n",
+              (long)nbytes, sizeof(b16_t));
+      return EXIT_FAILURE;
+    }
+
+#ifdef CONFIG_LIBC_FLOATINGPOINT
+  temp = (double)temp16 / 65536.0
+#ifdef CONFIG_SYSTEM_LM75_FAHRENHEIT
+  printf("%3.2f degrees Fahrenheit\n", temp);
+#else
+  printf("%3.2f degrees Centigrade\n", temp);
+#endif
+#else
+#ifdef CONFIG_SYSTEM_LM75_FAHRENHEIT
+  printf("0x%04x.%04x degrees Fahrenheit\n", temp16 >> 16, temp16 & 0xffff);
+#else
+  printf("0x%04x.%04x degrees Centigrade\n", temp16 >> 16, temp16 & 0xffff);
+#endif
+#endif
+
+  return EXIT_SUCCESS;
+}